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clue; lead; key; trail; scent; track
handhold; hold
事件の手懸かりを求めて刑事は目撃者を一人ずつ訪ねた。
Seeking clues to the case, the detective visited each witness one by one.
わずかな手懸かりから犯人の居場所を特定することに成功した。
They succeeded in identifying the criminal's whereabouts from a slight clue.
有力な手懸かりが見つかり捜査は大きく前進したという。
A significant clue was found and the investigation reportedly made great progress.